In which aspects do organisms of the animal kingdom show diversity?

$A$ list of animals is given below. Identify the animals with an open circulatory system and choose the correct answer.
$(A)$ Ascidia $(B)$ Cockroach
$(C)$ Earthworm $(D)$ Prawn
$(E)$ Silverfish $(F)$ Snail
$(G)$ Squid

Choose the correct pair:

$A$ larval stage occurs in the life history of all members of the group:

Match the following organisms with their respective characteristics:

$(a)$ Pila	$(i)$ Flame cells
$(b)$ Bombyx	$(ii)$ Comb plates
$(c)$ Pleurobrachia	$(iii)$ Radula
$(d)$ Taenia	$(iv)$ Malpighian tubules

Select the correct option from the following:

Identify the mismatch among the following pairs: